The Patagonia Arbor Classic Pack 25L carries most everything you need in one large, main compartment. It closes with a drawcord and seals with a large flap pocket to hold your inventory of everyday goods—from books, lunch, and a shell, to climbing shoes and a chalkbag. A zippered pocket beneath the lid stashes a wallet and phone out of view. Inside, a raised, padded sleeve fits most fifteen-inch laptops and protects from hard knocks and also doubles as an insulated hydration reservoir when you hit the trails. A small, zippered front pocket holds your keys, sunglasses, and boarding pass. Human Curve straps conform ergonomically to your shoulders and upper chest for all-day comfort under loads.